High-performance vector frequency converters of the SPLC-NZ8400-185G/200P series are designed to control high-load three-phase electric motors 380 V with a capacity of up to 185 kW, where overloads may occur, and advanced requirements are set for control quality. These frequency converters have a higher microprocessor performance than the SPLC-АТ20 series, which allows SPLC-NZ8000 to perform operations faster and thus provide sensorless vector control of rotation speed with precision of ±0.5%. If necessary, the inverter can switch to simple scalar control mode U/f with lower accuracy and in "Pump" mode for working with more powerful motors but at lower load (details below).
Also, the converter SPLC-NZ8000 can additionally be fitted with a PG board (purchased separately). With it, a frequency converter can connect an encoder sensor to monitor motor speed and rotor position. Vector control with feedback offers increased response and control accuracy of rotational frequency up to ±0.02%, allows controlling torque with precision up to ±5%, and works not only with asynchronous but also synchronous motors.
Table — Main Technical Parameters of Frequency Converters SPLC-NZ8400-185G/200P
| Input Voltage |
3ph 380 V
|
| Output Voltage |
3ph 380 V
|
| Output Power |
up to 185 kW (200 kW in "Pump" mode)
|
| Output Frequency Range |
from 0.1 to 3200.0 Hz (V/f) |
| Rated Input Current |
330 A (370 A in "Pump" mode)
|
| Rated Output Current |
340 A (380 A in "Pump" mode)
|
| Protection Degree EN 60529 |
IP20 |
When installing a frequency converter in a protective cabinet, its control panel (operator panel) can be detached and installed on the front panel. A cable connector needs to be purchased for this.
Technical Specifications of the SPLC-NZ8000 Series
Standard Frequency Converter Functions of SPLC-NZ8000
| Control Modes |
Sensorless Vector Control (SFVC)
Closed Loop Vector Control (CLVC, with PG)
Volt-Frequency (V/F) Control |
| Maximum Output Frequency |
Vector Control: 0-320 Hz
V/F Control: 0-3200 Hz
|
| Carrier Frequency |
1-16 kHz
The carrier frequency is automatically adjusted depending on the load characteristic. |
| Frequency Setting Resolution |
Digital setting: 0.01 Hz
Analog setting: maximum frequency × 0.025% |
| Starting Torque |
Type G: 0.5 Hz/150% (SFVC); 0 Hz/180% (CLVC, with PG)
Type: 0.5 Hz/100% |
| Speed Range |
1:100 (SFVC)
1:1000 (CLVC)
|
| Speed Accuracy |
±0.5% (SFVC), ± 0.02% (CLVC, with PG)
|
| Torque Accuracy |
±5% (CLVC, with PG) |
| Overload Capacity |
G type: 60 s at 150% of rated current, 3 s at 180% of rated current
P type: 60 s at 120% of rated current, 3 s at 150% of rated current |
| Torque Boost |
Automatic Boost
Manual Boost 0.1%-30.0%
|
| V/F Curve |
Linear V/F curve
Multi-point V/F curve
Step V/F curve (1.2, 1.4, 1.6, 1.8, quadratic) |
| V/F Separation |
Two types: full separation, partial separation |
| Acceleration/Deceleration Mode |
Linear curve
S-curve
Four groups of acceleration/deceleration time in range 0.0-6500.0 s
|
| DC Braking |
DC braking frequency: from 0.00 Hz to max frequency
Braking time: 0.0-100.0 s
Braking current action option: 0.0% -100.0%
|
| JOG Control |
JOG frequency range: 0.00-50.00 Hz
JOG acceleration/braking time: 0.0-6500.0 s
|
| Built-in Multiple Pre-set Speeds |
Up to 16 speeds implemented via simple PLC function or combination of terminal states |
| Built-in PID |
Enables PID regulation of the system in a closed loop |
| Automatic Voltage Tuning |
Can ensure constant output voltage when main voltage changes. |
| Overcurrent and Voltage Control |
Automatically limits current and voltage during operation to prevent frequent tripping due to overcurrent or overvoltage. |
The inclusion of simple scalar control in SPLC-NZ8000 converters makes it possible to select the load type “General” or “Pump” in the menu.
-
General — general industrial mode for motors operating with approximately the same torque at different speeds (compressors, conveyors, lifts). In this mode, the frequency converter can provide a starting torque greater than 150% for acceleration to overcome friction and inertia.
-
Pump — specialized mode for fans, pumps, and other electric motors operating with torque that increases with speed and when there is no need for high starting torque.
Thus, the frequency converter SPLC-NZ8400-185G/200P is intended for controlling motors up to 185 kW, but when switched to scalar control and “Pump” mode, it can control motors up to 200 kW. In this case, the allowable overload will decrease: while in the normal "General" mode, a load of no more than 150% for 60 s or 180% for 3 s is allowed, in the "Pump" mode with a more powerful motor, these figures drop — overload no more than 120% for 60 s or 150% for 3 s.
Individual Functions of SPLC-NZ8000
| Supports Different PG Boards |
Supports PG boards for rotating transformer, differential input, UVW differential input, resolver, and open collector input |
| Run Through Power Drop |
The voltage drop is compensated by the load feedback energy, so the drive can continue running for a short time. |
| Current Limiting |
Avoids drive frequency faults due to overcurrent. |
| High Performance |
Control of asynchronous and synchronous motors is realized using high performance current vector technology. |
| Time Control |
Time range: 0.0-6500.0 min |
| Communication Method |
Modbus (standard)
Profibus-DP (optional)
CANlink (optional)
CAN (optional) |
| Protection Modes |
Detection of motor short circuit at switch on, protection on input or output phase break, overcurrent, overvoltage, under-voltage, overheating, and overload. |
Principle Scheme of Frequency Converter SPLC-NZ8400-185G/200P
SPLC-NZ8000 has multifunctional input-output control terminals, the function of which can be assigned independently in the settings — determining the set frequency, issuing the forward run command, stopping, etc.:
- Input: 8 discrete inputs (one of them high-speed pulse), 2 analog inputs (one 0...10 V or 0...20 mA, the second only for +10...-10 V;
- Output: 1 discrete transistor output (high speed), 2 relays 250 VAC 3 A or 30 VDC 1 A, 2 analog outputs (0...10 or 0...20 mA).
By default, the frequency converter supports the most common communication port in Ukrainian enterprises RS-485, but these frequency inverters can be supplied with a board for data transmission Profibus or CAN upon request, making it easy to integrate the equipment into any modern industrial network.
Choosing a Frequency Converter Model of SPLC-NZ8000 Series
Model Parameters of SPLC-NZ8000 Series Converters for Three-Phase Motors 380 V
| Model |
Rated Output Power, kW |
Rated Input Current, A |
Rated Output Current, A |
| SPLC-NZ8400-0R4G4 |
0.4 |
3.4 |
1.2 |
| SPLC-NZ8400-0R7G4 |
0.75 |
3.8 |
2.5 |
| SPLC-NZ8400-1R5G4 |
1.5 |
5 |
3.7 |
| SPLC-NZ8400-2R2G4 |
2.2 |
5.8 |
5 |
| SPLC-NZ8400-3R7G/5R5P4 |
3.7/5.5 |
10/15 |
9/13 |
| SPLC-NZ8400-5R5G/7R5P4 |
5.5/7.5 |
15/20 |
13/17 |
| SPLC-NZ8400-7R5G/11P4 |
7.5/11 |
20/26 |
17/25 |
| SPLC-NZ8400-11G/15P4 |
11/15 |
26/35 |
25/32 |
| SPLC-NZ8400-15G/18.5P4 |
15/18.5 |
35/38 |
32/37 |
| SPLC-NZ8400-18.5G/22P4 |
18.5/22 |
38/46 |
37/45 |
| SPLC-NZ8400-22G/30P4 |
22/30 |
46/62 |
45/60 |
| SPLC-NZ8400-30G/37P4 |
30/37 |
62/76 |
60/75 |
| SPLC-NZ8400-37G/45P4 |
37/45 |
76/90 |
75/90 |
| SPLC-NZ8400-45G/55P4 |
45/55 |
90/105 |
90/110 |
| SPLC-NZ8400-55G4 |
55 |
105 |
110 |
| SPLC-NZ8400-75P4 |
75 |
140 |
150 |
| SPLC-NZ8400-75G/90P4 |
75/90 |
140/160 |
150/176 |
| SPLC-NZ8400-90G/110P4 |
90/110 |
160/210 |
176/210 |
| SPLC-NZ8400-110G/132P4 |
110/132 |
210/240 |
210/253 |
| SPLC-NZ8400-132G/160P4 |
132/160 |
240/290 |
253/300 |
| SPLC-NZ8400-160G/185P4 |
160/185 |
290/330 |
300/340 |
| SPLC-NZ8400-185G/200P4 |
185/200 |
330/370 |
340/380 |
| SPLC-NZ8400-200G/220P4 |
200/220 |
370/410 |
380/420 |
On order
